TWI512227B - Screen supporting device and torsion adjusting structure - Google Patents

Description

Screen support device and torque adjustment structure

The present invention relates to a screen support device, and more particularly to an adjustable screen support device and a torque adjustment structure.

Most of the conventional screen support devices are equipped with a washer screw and the positive force generated by the screw lock to compress the washer to generate torque. If the torque of the demand is large, it is necessary to make a structure that is larger and meets the torque demand (for example, a gasket with a large cross-sectional area).

However, the conventional screen supporting device for carrying the bearing of the screen is mostly based on the weight of the screen to be carried as the design basis of the torque, that is, the torque of the carrier of the conventional screen supporting device and Not adjustable.

However, due to the prevalence of today's touch screens, when using touch screens, most of the support members of the screen support device have a large torque, and when folded, it is desirable that the load of the support device of the screen support device is more small. Therefore, the conventional screen supporting device obviously cannot meet the above requirements of the torque conversion.

Therefore, the present inventors have felt that the above-mentioned deficiencies can be improved, and they have devoted themselves to research and cooperated with the application of the theory, and finally proposed a present invention which is reasonable in design and effective in improving the above-mentioned defects.

Embodiments of the present invention provide a screen support device and a torque adjustment structure that can provide two different magnitudes of torque for the user to select for different situations.

The embodiment of the present invention provides a screen supporting device, comprising: a base; a bracket module, wherein opposite end portions are respectively defined as a bottom end portion and a top end portion, and the bottom end portion is pivotally disposed along a rotation axis a pivoting structure is disposed at a top end of the bracket module, and the pivoting structure includes: a shaft that is disposed at a top end portion of the bracket module, the shaft has a non-circular cross section, and The longitudinal direction of the shaft is defined as a central axis, the central axis is parallel to the rotation axis; and a gasket set is sleeved on the shaft; a carrier member for carrying a screen, and the carrier Forming a perforation, the perforation of the carrier is sleeved on the shaft, and the carrier can pivot relative to the shaft with the central axis as an axis; and a torque adjustment structure comprising: a gear, the shaft Opening a circular perforation, the perforation of the gear is sleeved on the shaft, and the gear can rotate with respect to the shaft with the central axis as an axis; a pair of friction washers each have a Non-circular and shaped corresponding to the positioning hole of the shaft section, a positioning hole of the pair of friction pads is sleeved on the shaft, and the pair of friction pads respectively abut on opposite end faces of the gear; and a link set is mounted on the carrier, and the connecting rod The set has an engaging portion, the engaging portion and the gear are parallel to the central axis, the distance between the engaging portion and the central axis is smaller than the radius of the addendum circle of the gear, and the moving path of the engaging portion passes through the gear Between any two adjacent teeth, as the link is horizontally displaced along the central axis, the engagement portion can be horizontally displaced relative to the gear and along the central axis to enable the engagement portion to Relative to the gear and moving parallel to the central axis, the link set can be adjusted relative to the carrier between an engaged position and a separate position; wherein when the engaging portion is engaged with any two adjacent sides of the gear When the teeth are between the teeth, the position of the link group is defined as the meshing position, and the shaft and the pair of friction washers sleeved thereon are kept stationary, so that the carrier can pass through the connection when pivoting The meshing portion of the rod group interlocks the gear to make the gear with the central axis The shaft rotates and rubs the pair of friction washers to provide an additional torque of the carrier; when the engaging portion is separated from the gear, the position of the link group is defined as the separated position, and the shaft and the sleeve are sleeved The pair of friction shims thereon remain stationary so that the relative position of the gear and the pair of friction shims remains unchanged when the carrier is pivoted.

The embodiment of the present invention further provides a torsion adjustment structure for mounting on a non-circular shaft and a carrier. The long axis direction of the shaft is defined as a central axis, and the carrier is used to carry a bearing. The screen can be pivoted relative to the shaft with the central axis as an axis. The torque adjustment structure includes: a gear having a circular through hole formed in the axial direction, and the through hole of the gear is sleeved on the shaft, and the The gear can be self-rotating relative to the shaft with the central axis as an axis; a pair of friction washers each having a non-circular shape and a positioning hole corresponding to the cross section of the shaft, the pair of friction pads a positioning hole is sleeved on the shaft, and the pair of friction pads respectively abut on opposite end faces of the gear; and a link set is mounted on the carrier, and the link set has an engaging portion, The engaging portion and the gear are parallel to the central axis, the distance between the engaging portion and the central axis is smaller than the radius of the addendum circle of the gear, and the moving path of the engaging portion is along any two adjacent wheels passing through the gear Between the teeth, as the link is displaced horizontally along the central axis The engaging portion is horizontally displaceable relative to the gear and along the central axis such that the engaging portion is movable relative to the gear and parallel to the central axis, so that the link set can be aligned with respect to the carrier Adjusting between the engaged position and a disengaged position; wherein when the engaging portion is engaged between any two adjacent teeth of the gear, the position of the link set is defined as the engaged position, and the shaft and the sleeve are set The pair of friction washers thereon are kept stationary, so that the carrier can interlock the gear through the meshing portion of the link set when pivoting, so that the gear rotates and rubs itself with the central axis as an axis a friction pad for providing an additional torque of the carrier; when the engaging portion is separated from the gear, the position of the link group is defined as the separated position, the shaft and the pair of friction pads sleeved thereon The sheet remains stationary so that the relative position of the gear to the pair of friction pads remains the same when the carrier is pivoted.

In summary, the screen supporting device and the torsion adjusting structure provided by the embodiments of the present invention selectively provide additional torque through the cooperation between the link set, the gear and the friction pad, so that the carrier can be high. Switch between torque state and low torque state.

In order to further understand the features and technical contents of the present invention, please refer to the following The detailed description of the present invention and the accompanying drawings are intended to illustrate the invention and not to limit the scope of the invention.

100‧‧‧Screen support device

1‧‧‧Base

2‧‧‧ bracket module

21‧‧‧ body rod

22‧‧‧ four-link

221‧‧‧Positioning holes

23‧‧‧ pivot unit

3‧‧‧ pivot structure

31‧‧‧ shaft

32‧‧‧washer set

321‧‧‧stop washer

3211‧‧‧Piece

3212‧‧‧stop film

3213‧‧‧Positioning holes

4‧‧‧ Carrier

41‧‧‧Loading board

42‧‧‧Connecting Department

421‧‧‧Perforation

422‧‧‧track hole

423‧‧‧Arc groove

5‧‧‧Torque adjustment structure

51‧‧‧ Gears

511‧‧‧ Ontology

5111‧‧‧Perforation

5112‧‧‧Bumps

512‧‧‧ teeth

52‧‧‧Friction gasket

521‧‧‧Positioning holes

53‧‧‧ linkage group

531‧‧‧ Positioning block

532‧‧ ‧ lever

533‧‧‧Sliding parts

5331‧‧‧Sliding rod

5332‧‧‧Connection block

5333‧‧‧ Slider

5334‧‧‧Meshing Department

534‧‧‧ Connecting rod

535‧‧‧Reset parts

5351‧‧‧Compressed spring

5352‧‧‧ Limit pin

C‧‧‧ center axis

R‧‧‧ axis

200‧‧‧ screen (eg touch screen)

1 is a perspective view of a screen supporting device of the present invention.

2 is a partially exploded perspective view of the screen support device of the present invention.

3 is a partially exploded perspective view showing another view of the screen supporting device of the present invention.

4 is an exploded perspective view of the link set of the screen supporting device of the present invention.

Figure 5 is a partial cross-sectional view showing the screen supporting device of the present invention when the link set is in the engaged position.

Figure 6 is a partial cross-sectional view showing another view of the screen supporting device of the present invention when the link set is in the engaged position.

Figure 7 is a partial cross-sectional view showing the screen supporting device of the present invention when the link set is in the separated position.

Figure 8 is a partial cross-sectional view showing another view of the screen supporting device of the present invention when the link set is in the separated position.

Figure 9 is a perspective view showing the screen support device of the present invention when it is folded.

Please refer to FIG. 1 , which is an embodiment of the present invention. The embodiment is a screen supporting device 100 for carrying a screen 200 (eg, a touch screen). The screen support device 100 includes a base 1, a bracket module 2, two hinge structures 3, a carrier member 4, and a torque adjustment structure 5.

Hereinafter, the components of the screen supporting device 100 will be described in terms of structure and connection relationship, and then the operation of the screen supporting device 100 and the related use state will be described.

The base 1 is disposed on a working surface (eg, a table top), and opposite ends of the bracket module 2 are defined as a bottom end portion and a top end portion, respectively, and the bottom end portion of the bracket module 2 A pivot axis R is pivotally disposed at one end of the base 1 (such as the lower left end in FIG. 1), and the top end portion of the bracket module 2 is pivotally disposed on the two pivot structures 3, the carrier 4, and the torsion Adjust structure 5.

Further, the bracket module 2 has a main body rod 21 having a substantially H shape, two sets of four links 22, and two pivoting units 23 having torsion springs. The two sets of four links 22 are respectively disposed on opposite sides of the main body rod 21 (such as the left side and the right side in FIG. 1), and the bottom end portion of the main body rod 21 and the bottom end portions of the two sets of four links 22 are transmitted. The pivoting unit 23 is pivotally mounted on the base 1 along the axis of rotation R, so that the bracket module 2 can pivot relative to the base 1 with the axis of rotation R as an axis.

It should be noted that since the above-mentioned bracket module 2 and its pivotal relationship with the base 1 are not the improvement points of the present invention, the detailed structure of the present embodiment will not be described in detail. In other words, the above-mentioned four-bar linkage 22 can adopt a parallel four-link set or a non-parallel four-link set according to the designer's requirements, which is not limited herein.

The two pivot structures 3 are respectively pivoted on opposite sides of the top end portion of the bracket module 2 (such as the left side and the right side of the top end in FIG. 1 ). Since the two pivot structures 3 are substantially the same, the following figures only An exploded view of one of the pivot structures 3 is illustrated.

Further, referring to FIG. 2 and FIG. 3 and referring to FIG. 4 as appropriate, each pivot structure 3 includes a shaft 31 and a washer set 32. The shaft 31 has a non-circular cross section (corresponding to opposite sides of the cylinder). It is flattened along its long axis direction, and the long axis direction of the shaft 31 is defined as a central axis C.

The two shafts 31 are respectively disposed on opposite sides of the top end portion of the bracket module 2, that is, the top end portion of the main body rod 21 and the top ends of the two sets of four links 22, and the two shafts The central axes C each defined by the rods 31 overlap each other, and the central axis C is parallel to the rotational axis R.

In more detail, the top end portion of each of the four link groups 22 is formed with a positioning hole 221 (see FIG. 2) which is non-circular and has an outer shape corresponding to the cross section of the shaft 31, and each of the shafts 31 is disposed in each of the above. The positioning holes 221 of the four link sets 22 are such that each of the shafts 31 can be supported by the bracket module 2.

The two washer sets 32 each have a plurality of washers and are respectively sleeved on the two shafts 31 along the central axis C. Due to the type of gasket that the above-mentioned gasket set 32 has, it can be designed by the designer. Therefore, it is not described here, but it should be particularly noted that each of the washer sets 32 has a stop washer 321 having a body 3211 and a block extending from the plate body 3211. The retaining piece 3212, and the plate body 3211 is formed at a substantially central portion with a positioning hole 3213 corresponding to the cross section of the shaft 31. The positioning holes 3213 of the two stopper washers 321 respectively sleeve the two shafts 31 along the central axis C, thereby maintaining the relative positions of the stopper washers 321 and the shafts 31.

The carrier member 4 has a plate shape and has a carrier plate 41 and two connecting portions 42 for mounting the screen 200 to achieve the function of carrying the screen 200. The two connecting portions 42 are respectively formed by bending and extending from opposite sides of the bottom end of the carrier plate 41.

Furthermore, the two connecting portions 42 are formed with a through hole 421 and a track hole 422 at positions facing each other, and each connecting portion 42 is recessed at an equidistant end edge of the through hole 421 to form a circular arc groove 423. The through holes 421 of the two connecting portions 42 are respectively sleeved on the two axes 31 along the central axis C, so that the carrier 4 can pivot relative to the shaft 31 with the central axis C as an axis.

More specifically, the two connecting portions 42 are located inside the two stopper washers 321 and abut against the two stopper washers 321 , respectively. The blocking pieces 3212 of the two stopper washers 321 are respectively received in the two circular arc grooves 423, so that when the carrier 4 is pivoted, the opposite two of the circular arc grooves 423 are abutted through the blocking piece 3212. The end wall, in turn, limits the pivoting angle of the carrier 4. That is to say, the pivoting angle of the carrier 4 is substantially the angle of the arc angle of the circular arc groove 423.

The torque adjustment structure 5 includes two gears 51 , two pairs of friction washers 52 , and a link set 53 . It should be noted that the type of the gear 51 described above is exemplified by a spur gear in the present embodiment, but in practical applications, the type of the gear 51 and its corresponding configuration are not limited thereto.

Each of the gears 51 defines a circular through hole 5111 along its axial direction, and each of the friction pads 52 defines a positioning hole 521 which is non-circular and corresponds to the cross section of the shaft 31. In more detail, each gear 51 has a cylindrical body 511 and a number The teeth 512, the through holes 5111 are formed in the axial direction from the central portions of the opposite end faces of the body 511, and the teeth 512 are formed to extend radially from the ring side of the body 511.

The through holes 5111 of the two gears 51 are respectively sleeved on the two axes 31 along the central axis C, and the gears 51 can rotate spontaneously with respect to the shaft 31 with the central axis C as an axis. The positioning holes 521 of the two pairs of friction washers 52 are also sleeved on the two axial rods 31 along the central axis C, and each pair of friction washers 52 abuts against opposite end faces of the body 511 of each gear 51. Further, each of the gears 51 and the pair of abutting friction pads 52 are located inside the adjacent connecting portion 42 and sandwiched between the two washers of the washer set 32.

It should be noted that the opposite ends of the body 511 of each gear 51 and the surfaces of the pair of friction pads 52 abutting thereon can be designed to have a better friction effect according to the designer's requirements, so that the gear 51 is opposite to the gear 51. When the friction pad 52 rotates, a large friction force is generated, thereby achieving an effect of increasing the torque. For example, the main body 511 of the gear 51 protrudes from each of the opposite end faces by a plurality of protrusions 5112 arranged in a ring shape, thereby contacting and rubbing against the pair of friction pads 52 that abut each other. Alternatively, the positive force of the gear 51 abutting against the friction pad 52 can be adjusted according to the designer's needs, so that the gear 51 is rotated with respect to the friction pad 52 to generate different frictional forces, thereby achieving the effect of adjusting the torque. For example, the designer can increase the positive force of the gear 51 abutting against the friction pad 52 by tightening the nut.

The connecting rod set 53 is located substantially in the covering range of the carrier 4 and is mounted on the connecting portion 42 of the carrier 4, and the connecting rod set 53 can be in an engaged position relative to the carrying member 4 (see FIGS. 5 and 6). ) is adjusted between a separate position (as in Figures 7 and 8).

Specifically, the link set 53 has a positioning block 531, a lever 532, a sliding member 533, a connecting rod 534 and a reset member 535. The positioning block 531 is fixed to one of the connecting portions 42 of the carrier 4, and the position where the connecting portion 42 and the positioning block 531 are fixed to each other is located below the rail hole 422. The lever 532 is pivotally disposed on the positioning block 531, and the lever 532 partially protrudes from the shielding range of the carrier board 41 to be exposed. For the user to manipulate the control.

Moreover, the opposite ends of the sliding member 533 are disposed in the track holes 422 of the two connecting portions 42 , and the sliding member 533 has two engaging portions 5334 , and the connecting rods 534 are respectively pivotally connected to the lever 532 and the sliding member 533. Wherein, the pivoting lever 532, the connecting rod 534 and the pivoting direction mentioned by the sliding member 533 are substantially perpendicular to the central axis C, and the lever 532 is closer to the connecting rod 534 than the sliding member 533. Carrier plate 41.

Thereby, when the lever 532 of the link group 53 is toggled, the slider 533 is driven via the connecting rod 534 so that the slider 533 can reciprocally move in a direction parallel to the central axis C, so that each meshing portion The 5334 is movable relative to the gear 51 and parallel to the central axis C.

In more detail, each of the engaging portions 5334 and its corresponding gear 51 are parallel to the central axis C, the distance between any of the engaging portions 5334 to the central axis C is smaller than the radius of the addendum circle of the gear 51, and any of the engaging portions 5334 The path of travel is between any two adjacent teeth 512 that pass through the gear 51. As the linkage 53 is displaced horizontally along the central axis C, the engagement portion 5334 can be horizontally displaced relative to the gear 51 and along the central axis C such that the engagement portion 5334 can be relative to the gear 51 and parallel to the central axis C. Moving, reaching the link set 53 can be adjusted relative to the carrier 41 between the engaged and disengaged positions.

The reset member 535 abuts against the slider 533 and the connecting portion 42. When the slider 533 moves relative to the connecting portion 42, the reset member 535 will be deformed by force to store a restoring force.

Therefore, when the lever 532 is not toggled, the two engaging portions 5334 are respectively engaged with the two gears 51, that is, each of the engaging portions 5334 is engaged between any two teeth 512 of each gear 51. At this time, the position of the link group 53 is defined as the meshing position (as shown in FIGS. 5 and 6). Since the slider 533 is not moved relative to the connecting portion 42, the reset member 535 is not pressed or pulled. Moreover, each of the shafts 31 is held still by the support of the bracket module 2, and the pair of friction pads 52 sleeved on each of the shafts 31 are also kept stationary.

At this time, if the pushing carrier 4 is pivoted, the carrier 4 will interlock each gear 51 via the engaging portion 5334 of the link group 53, so that each gear 51 rotates automatically against the central axis C and rubs against it. Each pair of friction pads 52, in turn, provides an additional torque to the carrier 4. That is to say, the carrier 4 is in a high torque state at this time, and it is required to push it with a large force.

It should be noted that the magnitude of the additional torque can be varied by adjusting the friction between each of the gears 51 and the pair of friction pads 52 that abut them, that is, by increasing each gear 51 and its abutment. The friction coefficient or the positive force between the pair of friction pads 52 increases the friction between each of the gears 51 and the pair of friction pads 52 that abut them, that is, the additional torque can be effectively increased.

When the lever 532 is toggled to separate the two engaging portions 5334 from the two gears 51, respectively, the position of the link group 53 is defined as the separated position (as shown in FIGS. 7 and 8). On the other hand, since the slider 533 is moved relative to the connecting portion 42, the returning member 535 is pressed or pulled to store a restoring force. Moreover, each of the shafts 31 and the pair of friction pads 52 sleeved thereon are kept stationary.

At this time, if the pushing carrier 4 is pivoted, each gear 51 is not interlocked, so that each gear 51 can maintain the relative position with the friction pad 52. That is to say, the carrier 4 is now in a low torsion state and can be pushed to pivot with a small force. Moreover, if the toggle lever 532 is stopped, the restoring force provided by the reset member 535 will cause the link set 53 to return from the disengaged position to the engaged position.

In addition, the connecting portion 42 can replace the positioning block 531 by a moderately varying design. For example, the connecting portion 42 of FIG. 4 is located below the track hole 422, and can be extended and bent to the positioning block 531. The position of the lever 532 is pivoted to achieve the effect of replacing the positioning block 531.

The design requirements of the slider 533 and the reset member 535 are as described above, and the specific embodiments of the slider 533 and the reset member 535 are exemplified as follows, but are not limited thereto.

Referring to FIG. 4 and referring to FIG. 2 and FIG. 3 as appropriate, the sliding member 533 includes a sliding rod 5331, a connecting block 5332 and two sliders 5332 in this embodiment. And the complex The bit member 535 has a compression spring 5351 and a limit pin 5352.

The opposite ends of the sliding rod 5331 are slidably disposed through the track holes 422 of the two connecting portions 42 . The connecting blocks 5332 are fixed to the bottom edge of the sliding rod 5331 and face the positioning blocks 531 facing each other. The two sliders 5333 are fixed to the top edge of the sliding rod 5331 and have positions corresponding to the two gears 51 respectively, and the two sliders 5333 are respectively formed with one of the engaging portions 5334.

The connecting rod 534 is pivotally disposed on the connecting block 5332. Further, the connecting rod 534 and the lever 532 are substantially located on a side of the sliding rod 5331 away from the engaging portion 5334, and the connecting rod 534 and the connecting block 5332 are connected. The pivoting portion and the pivoting portion of the lever 532 and the positioning block 531 are substantially at the same level.

Furthermore, the two ends of the compression spring 5351 respectively abut against the connecting portion 42 away from the lever 532 and the slider 5333, and the limiting pin 5352 is movably disposed through the connecting portion 42 away from the lever 532 and the inside of the compression spring 5351. It is fixed to the slider 5333 away from the lever 532.

Therefore, when the lever 532 is not toggled and the link set 53 is in the engaged position, the slider 5333 adjacent to the lever 532 abuts against the inner edge of the adjacent connecting portion 42, and the compression spring 5351 is not pressed.

When the lever 532 is toggled to position the link group 53 in the disengaged position (as shown in FIGS. 7 and 8), the lever 532 will move through the connecting rod 534 and the connecting block 5332 to drive the sliding rod 5331 to move. The block 5333, together with the connecting portion 42, presses the compression spring 5351 to deform the compression spring 5351 to store a restoring force.

In summary, through the design of the torque adjustment structure 5 described above, the screen support device 100 facilitates the user to selectively adjust the carrier 4 to a high torque state or a low torque state by manipulating the lever 532.

When the user wants to touch the screen 200 to perform the operation, the carrier 4 can be adjusted to a high torque state, so as to avoid the change of the inclination of the screen 200 during operation, and the operation is not smooth. If the user wants to close the screen support device 100, the carrier member 4 can be adjusted to a low torque state to facilitate more effortless folding of the screen support device 100 (Fig. 9).

Further, the above-described slider 533 is constituted by a plurality of components in the present embodiment, but is not excluded to be formed in other manners to reduce the number of components of the slider 533.

Furthermore, in another embodiment not shown, the torsion adjusting structure 5 can also be adjusted to have only one gear 51 and a pair of friction pads 52 and an engaging portion 5334.

In addition, the mounting position of the reset member 535 in this embodiment can also be appropriately adjusted according to the designer's requirements, and the compression spring 5351 can be replaced by a tension spring according to the installation position of the reset member 535, or the limit pin can be omitted. 5352. For example, the two ends of the tension spring can be respectively fixed on the surfaces of the positioning block 531 and the connecting block 5332 adjacent to each other, thereby achieving the effect of replacing the compression spring 5351 and the limiting pin 5352.

[Possible effects of embodiments of the present invention]

According to an embodiment of the invention, the above-mentioned screen supporting device is provided with a torsion adjusting structure, and through the cooperation between the connecting rod set, the gear and the friction pad, to selectively provide additional torque, so that the bearing member can be at a high torque Switch between state and low torque state.

Furthermore, the torsion adjustment structure is transmitted through the reset member of the link set such that when the toggle lever is stopped, the restoring force provided by the reset member can cause the link set to return from the disengaged position to the engaged position.

In addition, by adjusting the friction between each of the gears and the pair of friction pads that abut them, the magnitude of the additional torque can be effectively controlled. As in the present embodiment, by forming bumps on opposite end faces of the gear, the friction between each of the gears and the pair of friction pads abutting is increased, thereby effectively increasing the additional torque.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention.

2‧‧‧ bracket module

21‧‧‧ body rod

22‧‧‧ four-link

221‧‧‧Positioning holes

3‧‧‧ pivot structure

31‧‧‧ shaft

32‧‧‧washer set

321‧‧‧stop washer

3211‧‧‧Piece

3212‧‧‧stop film

3213‧‧‧Positioning holes

4‧‧‧ Carrier

41‧‧‧Loading board

42‧‧‧Connecting Department

421‧‧‧Perforation

422‧‧‧track hole

423‧‧‧Arc groove

5‧‧‧Torque adjustment structure

51‧‧‧ Gears

511‧‧‧ Ontology

5111‧‧‧Perforation

5112‧‧‧Bumps

512‧‧‧ teeth

52‧‧‧Friction gasket

521‧‧‧Positioning holes

53‧‧‧ linkage group

531‧‧‧ Positioning block

532‧‧ ‧ lever

533‧‧‧Sliding parts

5331‧‧‧Sliding rod

5332‧‧‧Connection block

5333‧‧‧ Slider

5334‧‧‧Meshing Department

534‧‧‧ Connecting rod

535‧‧‧Reset parts

5351‧‧‧Compressed spring

5352‧‧‧ Limit pin

C‧‧‧ center axis

Claims (10)

A screen supporting device includes: a base; a bracket module, wherein opposite end portions are respectively defined as a bottom end portion and a top end portion, the bottom end portion is pivotally disposed on the base along a rotation axis; a hinge structure The pivot structure is disposed at a top end of the bracket module, and the pivot structure includes: a shaft that is disposed at a top end portion of the bracket module, the shaft has a non-circular cross section, and the shaft is long The axis direction is defined as a central axis, the central axis is parallel to the rotation axis; and a gasket set is sleeved on the shaft; a carrier member for carrying a screen, and the carrier member is formed with a perforation, a through hole of the carrier is sleeved on the shaft, and the carrier is pivotable relative to the shaft with the central axis as an axis; and a torque adjustment structure includes: a gear having a circle formed in the axial direction a perforation of the gear, the perforation of the gear is sleeved on the shaft, and the gear can rotate with respect to the shaft with the central axis as an axis; a pair of friction washers each have a non-circular shape The type corresponds to the positioning hole of the shaft section, and the pair of friction pads a pair of holes are disposed on the shaft, and the pair of friction pads respectively abut the opposite end faces of the gear; and a link set is mounted on the carrier, and the link set has an engaging portion, The engaging portion and the gear are parallel to the central axis, the distance between the engaging portion and the central axis is smaller than the radius of the addendum circle of the gear, and the moving path of the engaging portion is along any two adjacent teeth passing through the gear Between when the link set is horizontally displaced along the central axis, the engaging portion can be horizontally positioned relative to the gear and along the central axis Shifting so that the engaging portion can move relative to the gear and parallel to the central axis, so that the link set can be adjusted relative to the carrier between an engaged position and a separated position; wherein when the engaging portion is engaged When the two adjacent teeth of the gear are between the two adjacent teeth, the position of the link group is defined as the meshing position, and the shaft and the pair of friction pads sleeved thereon are kept stationary, so that the carrier When pivoting, the gear can be interlocked via the meshing portion of the link set, the gear is self-rotating and rubbing the pair of friction pads with the central axis as an axis to provide an additional torque of the carrier; the meshing portion When the gear is separated from the gear, the position of the link set is defined as the separated position, and the pair of friction pads that are sleeved thereon and the friction pad are held stationary, so that the gear is rotated when the carrier is pivoted The relative position of the friction pad remains unchanged. The screen support device of claim 1, wherein the link set has a positioning block, a lever, a sliding member and a connecting rod, the positioning block is fixed to the carrier, and the lever is pivoted. In the positioning block, the sliding member is slidably disposed on the carrier, the two ends of the connecting rod are pivotally connected to the lever and the sliding member, and the sliding member has the engaging portion, and the lever can be toggled The slider is coupled through the connecting rod such that the link set is selectively located at the engaged position and the separated position. The screen support device of claim 2, wherein the link set has a reset member abutting the slide member and the carrier member, when the slider member slides relative to the carrier member, The reset member is deformed by force to store a restoring force. The screen supporting device of claim 2, wherein the sliding member has a sliding rod, a connecting block and a slider, the sliding rod is slidably disposed on the carrier, the connecting block and the slider Fixed to the sliding rod, and the connecting rod is pivotally disposed on the connecting block, and the slider is formed with the engaging portion. The screen support device of claim 4, wherein the link set has a compression spring and a limit pin, and the two ends of the compression spring abut against the carrier and the slider respectively, and the limit The position pin is slidably disposed on the carrier and the compression spring and is fixed to the slider. The screen supporting device according to any one of claims 1 to 5, wherein a top end portion of the bracket module is formed with a positioning hole that is non-circular and has an outer shape corresponding to a cross section of the shaft, and the shaft is worn. The positioning hole is disposed at a top end of the bracket module, so that the shaft can be supported by the bracket module. The screen supporting device according to any one of claims 1 to 5, wherein a plurality of bumps are formed on opposite end faces of the gear, and the bumps respectively abut against the pair of friction pads. The screen support device of any one of claims 2 to 5, wherein the slidable direction of the slider is substantially parallel to the central axis. The screen supporting device according to any one of claims 2 to 5, wherein the positioning block, the lever, the sliding member and the connecting rod are pivotally oriented substantially perpendicular to the central axis. A torque adjustment structure is disposed on a shaft having a non-circular cross section and a carrier member, wherein a longitudinal direction of the shaft is defined as a central axis, and the carrier is configured to carry a screen and can be used therein The axis is pivoted relative to the shaft, the torsion adjusting structure includes: a gear having a circular through hole formed in the axial direction, a through hole of the gear is sleeved on the shaft, and the gear can be the central axis Rotating with respect to the shaft for the shaft; a pair of friction washers each having a non-circular shape and a positioning hole corresponding to the cross section of the shaft, the positioning holes of the pair of friction pads are sleeved on the shaft a shaft, and the pair of friction washers respectively abut on opposite end faces of the gear; and a link set mounted on the carrier, and the link set has an engaging portion, the engaging portion and the gear Parallel to the central axis, the meshing portion The distance to the central axis is less than the radius of the addendum circle of the gear, and the path of movement of the meshing portion is between any two adjacent teeth passing through the gear, along which the link set is along the central axis When displaced horizontally, the engaging portion is horizontally displaceable relative to the gear and along the central axis such that the engaging portion is movable relative to the gear and parallel to the central axis, to enable the link set to be opposite to the carrier The member is adjusted between an engaged position and a separated position; wherein when the engaging portion is engaged between any two adjacent teeth of the gear, the position of the link set is defined as the engaged position, and the shaft And the pair of friction washers disposed thereon are fixed, so that the carrier can interlock the gear through the meshing portion of the link set when pivoting, so that the gear rotates automatically with the central axis as an axis And rubbing the pair of friction washers to provide an additional torque of the carrier; when the engaging portion is separated from the gear, the position of the link set is defined as the separated position, the shaft and the sleeve disposed thereon Keep the friction pad stationary so that the carrier is pivoted The gear friction pad relative positions remain unchanged.